COMPAQ COMPUTER CORPORATION
===========================

   SOUND BOARD

   Card Type     Sound card                                       
   Chipset       Unidentified                                     
   Controller    
   I/O Options   Line in, Microphone in (2), volume control,      
                 stereo speaker out (2), mono speaker out,        
                 game/MIDI port, SCSI CD-ROM interface, CD-ROM    
                 audio out, PC speaker in                         
   Maximum Dram  N/A                                              

<gopher://bitreich.org/I/th99/i/C-D/50482-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Purpose       | Location |     Purpose     | Location |
   |--------------------+----------+-----------------+----------|
   | Line in            |    J1    | Molex-D 4 audio |    J6    |
   |                    |          | out             |          |
   |--------------------+----------+-----------------+----------|
   | Microphone in      |    J2    | Right (mono)    |    J7    |
   |                    |          | speaker out     |          |
   |--------------------+----------+-----------------+----------|
   | Stereo speaker out |    J3    | Audio I/O (see  |    J8    |
   |                    |          | table below)    |          |
   |--------------------+----------+-----------------+----------|
   | Game/MIDI port     |    J4    | PC Speaker in   |    J9    |
   |--------------------+----------+-----------------+----------|
   | SCSI CD-ROM        |    J5    | Volume control  |    R1    |
   | interface          |          |                 |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        CONNECTOR J8                        |
   |------------------------------------------------------------|
   |       Purpose        |  Pin  |       Purpose        | Pin  |
   |----------------------+-------+----------------------+------|
   | Microphone in ground |   1   | Right speaker out    |  5   |
   |----------------------+-------+----------------------+------|
   | Microphone in ground |   2   | Left speaker out     |  6   |
   |----------------------+-------+----------------------+------|
   | Microphone in        |   3   | Right speaker return |  7   |
   |----------------------+-------+----------------------+------|
   | Speaker out ground   |   4   | Left speaker return  |  8   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           INTERNAL AUDIO AMPLIFIER CONFIGURATION           |
   |------------------------------------------------------------|
   |  >>  Left amp    |   Right amp   |           JP5            |
   |-----------------+---------------+--------------------------|
   |   >>  Enabled    |    Enabled    | Pins 2 & 3, 5 & 6 closed |
   |-----------------+---------------+--------------------------|
   |   >>  Disabled   |   Disabled    | Pins 1 & 2, 4 & 5 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          BASE I/O ADDRESS FOR MIDI PORT SELECTION          |
   |------------------------------------------------------------|
   |        >>  Address          |              JP4              |
   |----------------------------+-------------------------------|
   |          >>  330h           |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |          >>  300h           |        Pins 1 & 2 open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         BASE I/O ADDRESS FOR SOUND CARD SELECTION          |
   |------------------------------------------------------------|
   |        >>  Address          |              JP6              |
   |----------------------------+-------------------------------|
   |          >>  220h           |   Pins 7 & 8, 9 & 10 closed   |
   |----------------------------+-------------------------------|
   |          >>  240h           |      Pins 9 & 10 closed       |
   |----------------------------+-------------------------------|
   |          >>  260h           |       Pins 7 & 8 closed       |
   |----------------------------+-------------------------------|
   |          >>  280h           |    Pins 7 & 8, 9 & 10 open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |       BASE I/O ADDRESS FOR SCSI INTERFACE SELECTION        |
   |------------------------------------------------------------|
   |          >>  Address           |            JP7             |
   |-------------------------------+----------------------------|
   |            >>  340h            |            Open            |
   |-------------------------------+----------------------------|
   |            >>  140h            |           Closed           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           INTERRUPT FOR SCSI INTERFACE SELECTION           |
   |------------------------------------------------------------|
   |          >>  IRQ            |              JP3              |
   |----------------------------+-------------------------------|
   |            >>  9            |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |           >>  10            |       Pins 3 & 4 closed       |
   |----------------------------+-------------------------------|
   |           >>  11            |       Pins 5 & 6 closed       |
   |----------------------------+-------------------------------|
   |           >>  12            |       Pins 7 & 8 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             INTERRUPT FOR SOUND CARD SELECTION             |
   |------------------------------------------------------------|
   |          >>  IRQ            |              JP4              |
   |----------------------------+-------------------------------|
   |            >>  2            | Pins 11 & 12, 13 & 14 closed  |
   |----------------------------+-------------------------------|
   |            >>  5            |     Pins 13 & 14 closerd      |
   |----------------------------+-------------------------------|
   |            >>  7            |      Pins 11 & 12 closed      |
   |----------------------------+-------------------------------|
   |           >>  10            |  Pins 11 & 12, 13 & 14 open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  GAME PORT CONFIGURATION                   |
   |------------------------------------------------------------|
   |          >>  Port           |              JP6              |
   |----------------------------+-------------------------------|
   |         >>  Enabled         |       Pins 5 & 6 closed       |
   |----------------------------+-------------------------------|
   |        >>  Disabled         |        Pins 5 & 6 open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         8-BIT DMA CHANNEL FOR SOUND CARD SELECTION         |
   |------------------------------------------------------------|
   |        >>  Channel          |              JP4              |
   |----------------------------+-------------------------------|
   |            >>  0            |   Pins 3 & 4, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |            >>  1            |       Pins 5 & 6 closed       |
   |----------------------------+-------------------------------|
   |            >>  3            |       Pins 3 & 4 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |        16-BIT DMA CHANNEL FOR SOUND CARD SELECTION         |
   |------------------------------------------------------------|
   |        >>  Channel          |              JP4              |
   |----------------------------+-------------------------------|
   |            >>  5            |   Pins 7 & 8, 9 & 10 closed   |
   |----------------------------+-------------------------------|
   |            >>  6            |      Pins 9 & 10 closed       |
   |----------------------------+-------------------------------|
   |            >>  7            |       Pins 7 & 8 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          DMA CHANNEL FOR SCSI INTERFACE SELECTION          |
   |------------------------------------------------------------|
   |   >>  Channel     |        JP1         |        JP2         |
   |------------------+--------------------+--------------------|
   |       >>  0       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       >>  5       | Pins 3 & 4 closed  | Pins 3 & 4 closed  |
   |------------------+--------------------+--------------------|
   |       >>  6       | Pins 5 & 6 closed  | Pins 5 & 6 closed  |
   |------------------+--------------------+--------------------|
   |       >>  7       | Pins 7 & 8 closed  | Pins 7 & 8 closed  |
   +------------------------------------------------------------+